# Servos

Servos are a type of motor with internal feedback they can move to a set position. The type of servo you will come across most frequently have a set range of motion, but with precise position control you can do a whole manner of actions within the mechanics of your robot! Servo motors (or anything else you connect to the servo ports of your BrainBox) are controlled by accessing R.servos[], similar to how motors are accessed.

import robot
import time

R = robot.Robot()
R.servos[0].mode = robot.PWM_SERVO

R.servos[0] = 50

However, where the value of a motor determines the speed it turns, the value of a servo controls the position it is at on its rotation, with a range of -100 to 100. Try it out on your robot to see which values correspond to each position!